[Tex/LaTex] Any reason why \blacksquare and \box are causing errors


I am using the amsmath package. I just want a black box at the end of a proof, right-justified.

\blacksquare and \box both cause errors.

Actually, I'd prefer a musical quarter note if that's possible 🙂

Best Answer

Are you including the appropriate packages?



$\blacksquare$  \halfnote \quarternote

See LaTeX Comprehensive symbols list.

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